As the weight and size of the erected block and module of the offshore project are increased, new lifting plans by using floating cranes have been tried to enhance the production efficiency in the shipbuilding area. In this situation, crane lifting simulation is required to manage potential risk of lifting plan in advance. Therefore, we have developed a crane lifting simulation system, named SIMSON (SIMulation System Of New production planning), to satisfy this purpose in the shipbuilding area. SIMSON calculates the motion of the erected block and floating bodies such as vessels and floating cranes based on the multibody system dynamics with the hydrostatic and hydrodynamic forces. The calculated motion and wire rope tension are used for dynamic effect estimation. In this paper, we present the application of SIMSON to the several examples such as block lifting, derrick erection and flare tower turn-over in shipbuilding. Some cases are observed in the real operations and are also compared with simulation results.
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